package cn.tedu.v3;

import java.io.*;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.Scanner;

/**
 *多人聊天室  Version  3
 *Server服务器：找到CS多线程类
 * 读入放入线程中
 * 写出直接写在run方法
 */

public class Server {
    private ServerSocket serverSocket;

    public Server() {
        try {
            serverSocket = new ServerSocket(0101);
        } catch (BindException e) {
            System.out.println("请检查端口号，被占用~");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void start() {
        Socket socket = null;
        String ip=null;
        try {
            while (true) {
                System.out.println("等待客户端连接");
                socket = serverSocket.accept();
                new Thread(new CS(socket)).start();
            }
        } catch (IOException e) {
            System.out.println(ip+"客户端连接失效了~");
        } finally {

            if (serverSocket!=null&&!serverSocket.isClosed()){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    System.out.println("服务器关闭失败~~~");
                }
                System.out.println("服务器关闭成功~~Over");
            }
        }
    }
    public static void main(String[] args) {
        Server server = new Server();
        server.start();
    }
    //CS多线程类：控制客户端发来的通讯消息
    private class CS implements Runnable {

        private Socket socket;

        private String ip;

        public CS(Socket s){
            this.socket=s;
            ip=socket.getInetAddress().getHostAddress();

        }

        public void run() {
            PrintWriter pw=null;
             //BufferedReader br = null;
            try {
               //1.2读入操作
                BufferedReader br = new BufferedReader( new InputStreamReader(socket.getInputStream(), "UTF8"));
                //1.1写出操作【*】
                pw=new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream(),"UTF8")),true);
                //1.3 创建线程---Lambda--读入功能--存入线程中
                new Thread(()->{
                    //1.4线程中--创建变量--接收客户端发来文本
                    try {
                        String message;
                        while ((message=br.readLine())!=null) {//读入客户端
                            System.out.println(ip+"客户端说：" +message);
                            //1.6增加一句--每次客户端发给服务器内容
                            System.out.println("服务器端请输入：");
                        }
                    } catch (IOException e) {
                        System.out.println("客户端发来的消息断开了~");
                    }
                }).start();
              //1.5增加写出操作【修改目的：读入写出通顺】
              //1.5.1控制台卡住--输入内容
                Scanner input=new Scanner(System.in);
                //1.5.2一直写出
                while (true){
                    System.out.println("服务器请输入：");
                    String sme=input.nextLine();
                    pw.println("服务器说："+sme);
                }
            } catch (UnsupportedEncodingException e) {
                System.out.println("请检查客户端/服务器端编码集：不一致");
            } catch (SocketException e) {
                System.out.println("客户端连接被重置了~");
            } catch (IOException e) {
                System.out.println("客户端连接失效了~");
            } finally {
               /* if (br != null) {
                    try {
                        br.close();
                    } catch (IOException e) {
                        System.out.println("读入流断开连接");
                    }
*/
                    if (socket!=null&&!socket.isClosed()){
                        System.out.println(ip+"客户端退出服务器链接~");
                        try {
                            socket.close();
                        } catch (IOException e) {
                            System.out.println(ip+"客户端退出链接异常~");
                        }
                    }
                }

            }
        }
    }

